C6501 banding in cross direction

[edmund]

please help!!!has someone sorted this problem on the C6500 and C5601 .
BANDING IN THE CROSS DIRECTION.
we have replaced alll the boards including HV1 and HV2
We have replaced drums all four,transfer belt and transfer rollers
ther ewas a thread posted on this same problem before ,but no concrete solution

Please can someone help

[mrwho]

Can you share a scan of the problem with us?

[Si@danwood]

please help!!!has someone sorted this problem on the C6500 and C5601 .
BANDING IN THE CROSS DIRECTION.
we have replaced alll the boards including HV1 and HV2
We have replaced drums all four,transfer belt and transfer rollers
ther ewas a thread posted on this same problem before ,but no concrete solution

Please can someone help

Some scans would be good for us to evaluate but the highlighted section seems you may have the answer you may not have wanted to hear.Si

[edmund]

I donot have a secure server here so it is a bit difficult sharing this scan I will try and send on today
More info. We ran prints on our two showroom machines C5501 and C6501, thet are both both giving us the same banding condition
We run test prints in the technical mode test prints,set all four colours to 100 halftone and test pattern 53
we do the prints on line1 and the bands appear on dot1

I will keep you posted if we found anything new

[random]

ahhhh is this prominent in yellow? If so you need to turn the special screen dipsw for DOT off. It was designed to fix one problem but actually causes pretty horrfic banding.

[edmund]

thanks for the advice
Can you tell me what dipsw it is.Ihave checked the manual and the only one that indicate anything to do with changing screens is dipsw2 bit 5
I

[edmund]

thanks for the advice
Can you tell me what dipsw it is.I have checked the manual and the only one that indicate anything to do with changing screens is dipsw2 bit 5
I have sent this info to Japan hopefully they will reply and when they do I will definately let you

[edmund]

Answer From Japan

subject
yellow banding on dot1
This color apearance is totally "normal" behavour on this type of engine.
It is because under dot 1 the laser writes under a different angle and therefor yellow banding will occur ONLY on dot 1.
A very good workaround is the following:
- Utility
- System settings
- Expert adjustment
- Quality adjustment
- Custome screen
Now, select DOT2 -> TYPE2

After the settings are changed, perform all instructions on the same screen.

Next step is to callibrate the engine. I will reccoment to callibrate all screen types.
After engine callibration, callibrate the controller and here as well, make sure you callibrate DOT2.

Before you send the print job, select DOT2 type in the driver, or send the printjob to the hold que and change the screen settingin the job properties.
Please let me know your results.
Kind regards,

as per this answer we have to user dot 2
and this will close this query

thanks alot for your input

[random]

set dipsw 3-0 to 0 for dot

[edmund]

thanks alot random I will try this dipsw